From your screen shot, I'm guessing you're looking at it via View->Headers->All.
actually, in any/all header 'views' ...
You can see the original formatting (even in Thunderbird 2) using the Message Source function instead.
yup, aware of that. that's not the issue though ... rather, it's the 'mis'-display of the header in the header-views. bug's been reported to mozilla; 'discussion' there about "is it a bug, even though every OTHER client handles it correctly ..." etc etc honetsly, if 'they' don't want to fix it -- or even ackonwledge it -- there are alternative (like u say, MessageSource, or better yet, use a different mua/client). bottom line -- SA works perfectly; tbird's display of SA headers is shoddy. oh well. thanks.